Holding to the truth of death—death is al - ways most/just [one’s] own—shows an - other kind of cer tainty, more pri mor dial than any cer tainty re gard ing be ings en - coun tered within the world or for mal ob - jects;foritisthecertaintyof be ing-in-the-world.2 Mar tin Heidegger, Be ing and Time..